Pen



FIG. 1 is a perspective view of a pen, showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left elevational view thereof;

FIG. 5 is a right elevational view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof;

FIG. 8 is a perspective view of FIG. 1 in an exploded condition;

FIG. 9 is a referential cross sectional view taken along the line 9—9 of FIG. 6 for reference only;

FIG. 10 is a perspective view of a second embodiment of my new design of FIG. 1; and,

FIG. 11 is a perspective view of FIG. 10 in an exploded condition. 

The ornamental design for a pen, as shown and described. 